CVE-2026-54099

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-22. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. The WICD CSR auto-approver validates that a Certificate Signing Request contains the organization system:wicd-nodes but does not reject additional organization values such as system:masters. A compromised Windows worker node that holds WICD credentials can submit a CSR that is auto-approved and signed by the cluster, yielding a client certificate that grants cluster-administrator privileges and enabling full cluster takeover.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

June 22, 2026

Last Modified

July 29, 2026

Advisory Details (2)

Auto-updated Jun 22, 2026
Patch available. Sources: redhat.
redhat

2487950 – (CVE-2026-54099) CVE-2026-54099 windows-machine-config-operator: windows-machine-config-operator: WICD CSR extra-Organization allows privilege escalation to system:masters

https://bugzilla.redhat.com/show_bug.cgi?id=2487950
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-54099

Vendor Advisories for CVE-2026-54099(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenshift4-wincw/windows-machine-config-rhel9-operator:17836928002026-07-28redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 124× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 225 total refreshes for this CVE.

  1. 2026-08-30 19:17 UTCEPSS rescore
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 14:25 UTCEPSS rescore
  5. 2026-08-26 14:46 UTCEPSS rescore
  6. 2026-08-25 13:49 UTCEPSS rescore
  7. 2026-08-25 01:46 UTCEG score recompute
  8. 2026-08-25 01:46 UTCVendor advisory
  9. 2026-08-25 01:46 UTCGHSA enrichment
  10. 2026-08-24 13:56 UTCEG score recompute
  11. 2026-08-24 13:56 UTCVendor advisory
  12. 2026-08-24 13:56 UTCGHSA enrichment
  13. 2026-08-23 22:27 UTCVendor advisory
  14. 2026-08-23 22:27 UTCGHSA enrichment
  15. 2026-08-23 10:38 UTCEG score recompute
  16. 2026-08-23 10:38 UTCVendor advisory
  17. 2026-08-23 10:38 UTCGHSA enrichment
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 22:50 UTCVendor advisory
  20. 2026-08-22 22:50 UTCGHSA enrichment
  21. 2026-08-21 19:18 UTCVendor advisory
  22. 2026-08-21 19:18 UTCGHSA enrichment
  23. 2026-08-21 07:29 UTCEG score recompute
  24. 2026-08-21 07:29 UTCVendor advisory
  25. 2026-08-21 07:29 UTCGHSA enrichment
Show 75 more
  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 19:40 UTCVendor advisory
  3. 2026-08-20 19:40 UTCGHSA enrichment
  4. 2026-08-20 07:52 UTCEG score recompute
  5. 2026-08-20 07:52 UTCVendor advisory
  6. 2026-08-20 07:52 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 04:54 UTCEG score recompute
  9. 2026-08-19 04:54 UTCVendor advisory
  10. 2026-08-19 04:54 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-17 08:19 UTCVendor advisory
  13. 2026-08-17 08:19 UTCGHSA enrichment
  14. 2026-08-16 20:31 UTCEG score recompute
  15. 2026-08-16 20:31 UTCVendor advisory
  16. 2026-08-16 20:31 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 08:42 UTCEG score recompute
  19. 2026-08-16 08:42 UTCVendor advisory
  20. 2026-08-16 08:42 UTCGHSA enrichment
  21. 2026-08-16 02:14 UTCEPSS rescore
  22. 2026-08-15 20:54 UTCVendor advisory
  23. 2026-08-15 20:54 UTCGHSA enrichment
  24. 2026-08-15 08:48 UTCEG score recompute
  25. 2026-08-15 08:48 UTCVendor advisory
  26. 2026-08-15 08:48 UTCGHSA enrichment
  27. 2026-08-15 01:30 UTCEPSS rescore
  28. 2026-08-14 18:20 UTCVendor advisory
  29. 2026-08-14 18:20 UTCGHSA enrichment
  30. 2026-08-14 06:32 UTCEG score recompute
  31. 2026-08-14 06:32 UTCVendor advisory
  32. 2026-08-14 06:32 UTCGHSA enrichment
  33. 2026-08-13 22:00 UTCEPSS rescore
  34. 2026-08-13 18:43 UTCVendor advisory
  35. 2026-08-13 18:43 UTCGHSA enrichment
  36. 2026-08-13 04:29 UTCVendor advisory
  37. 2026-08-13 04:29 UTCGHSA enrichment
  38. 2026-08-12 16:40 UTCVendor advisory
  39. 2026-08-12 16:40 UTCGHSA enrichment
  40. 2026-08-12 04:52 UTCVendor advisory
  41. 2026-08-12 04:52 UTCGHSA enrichment
  42. 2026-08-11 17:03 UTCEG score recompute
  43. 2026-08-11 17:03 UTCVendor advisory
  44. 2026-08-11 17:03 UTCGHSA enrichment
  45. 2026-08-11 05:14 UTCEG score recompute
  46. 2026-08-11 05:14 UTCVendor advisory
  47. 2026-08-11 05:14 UTCGHSA enrichment
  48. 2026-08-11 00:00 UTCEPSS rescore
  49. 2026-08-10 17:26 UTCVendor advisory
  50. 2026-08-10 17:26 UTCGHSA enrichment
  51. 2026-08-10 04:00 UTCVendor advisory
  52. 2026-08-10 04:00 UTCGHSA enrichment
  53. 2026-08-09 16:11 UTCEG score recompute
  54. 2026-08-09 16:11 UTCVendor advisory
  55. 2026-08-09 16:11 UTCGHSA enrichment
  56. 2026-08-09 13:46 UTCEPSS rescore
  57. 2026-08-09 04:23 UTCEG score recompute
  58. 2026-08-09 04:23 UTCVendor advisory
  59. 2026-08-09 04:23 UTCGHSA enrichment
  60. 2026-08-08 16:37 UTCEPSS rescore
  61. 2026-08-08 16:35 UTCVendor advisory
  62. 2026-08-08 16:35 UTCGHSA enrichment
  63. 2026-08-08 04:45 UTCVendor advisory
  64. 2026-08-08 04:45 UTCGHSA enrichment
  65. 2026-08-07 16:55 UTCEG score recompute
  66. 2026-08-07 16:55 UTCVendor advisory
  67. 2026-08-07 16:55 UTCGHSA enrichment
  68. 2026-08-07 05:06 UTCVendor advisory
  69. 2026-08-07 05:06 UTCGHSA enrichment
  70. 2026-08-06 17:17 UTCEG score recompute
  71. 2026-08-06 17:17 UTCVendor advisory
  72. 2026-08-06 17:17 UTCGHSA enrichment
  73. 2026-08-06 13:47 UTCEPSS rescore
  74. 2026-08-06 05:28 UTCEG score recompute
  75. 2026-08-06 05:28 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-54099?
CVE-2026-54099 is a high vulnerability published on June 22, 2026. A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. The WICD CSR auto-approver validates that a Certificate Signing Request contains the organization system:wicd-nodes but does not reject additional organization values such as system:masters. A…
When was CVE-2026-54099 disclosed?
CVE-2026-54099 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on July 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54099 actively exploited?
CVE-2026-54099 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.6% of all scored CVEs.
What is the CVSS score of CVE-2026-54099?
CVE-2026-54099 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-54099?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54099, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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